Re-testing as a method of implementing external quality assessment program for COVID-19 real time PCR testing in Uganda.
<h4>Background</h4>Significant milestones have been made in the development of COVID19 diagnostics Technologies. Government of the republic of Uganda and the line Ministry of Health mandated Uganda Virus Research Institute to ensure quality of COVID19 diagnostics. Re-testing was one of t...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2024-01-01
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| Series: | PLoS ONE |
| Online Access: | https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0287272&type=printable |
| _version_ | 1797249197633699840 |
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| author | Erick Jacob Okek Fredrick Joshua Masembe Jocelyn Kiconco John Kayiwa Esther Amwine Daniel Obote Stephen Alele Charles Nahabwe Jackson Were Bernard Bagaya Stephen Balinandi Julius Lutwama Pontiano Kaleebu |
| author_facet | Erick Jacob Okek Fredrick Joshua Masembe Jocelyn Kiconco John Kayiwa Esther Amwine Daniel Obote Stephen Alele Charles Nahabwe Jackson Were Bernard Bagaya Stephen Balinandi Julius Lutwama Pontiano Kaleebu |
| author_sort | Erick Jacob Okek |
| collection | DOAJ |
| description | <h4>Background</h4>Significant milestones have been made in the development of COVID19 diagnostics Technologies. Government of the republic of Uganda and the line Ministry of Health mandated Uganda Virus Research Institute to ensure quality of COVID19 diagnostics. Re-testing was one of the methods initiated by the UVRI to implement External Quality assessment of COVID19 molecular diagnostics.<h4>Method</h4>participating laboratories were required by UVRI to submit their already tested and archived nasopharyngeal samples and corresponding meta data. These were then re-tested at UVRI using the WHO Berlin protocol, the UVRI results were compared to those of the primary testing laboratories in order to ascertain performance agreement for the qualitative & quantitative results obtained. Ms Excel window 12 and GraphPad prism ver 15 was used in the analysis. Bar graphs, pie charts and line graphs were used to compare performance agreement between the reference Laboratory and primary testing Laboratories.<h4>Results</h4>Eleven (11) Ministry of Health/Uganda Virus Research Institute COVID19 accredited laboratories participated in the re-testing of quality control samples. 5/11 (45%) of the primary testing laboratories had 100% performance agreement with that of the National Reference Laboratory for the final test result. Even where there was concordance in the final test outcome (negative or positive) between UVRI and primary testing laboratories, there were still differences in CT values. The differences in the Cycle Threshold (CT) values were insignificant except for Tenna & Pharma Laboratory and the UVRI(p = 0.0296). The difference in the CT values were not skewed to either the National reference Laboratory(UVRI) or the primary testing laboratory but varied from one laboratory to another. In the remaining 6/11 (55%) laboratories where there were discrepancies in the aggregate test results, only samples initially tested and reported as positive by the primary laboratories were tested and found to be false positives by the UVRI COVID19 National Reference Laboratory.<h4>Conclusion</h4>False positives were detected from public, private not for profit and private testing laboratories in almost equal proportion. There is need for standardization of molecular testing platforms in Uganda. There is also urgent need to improve on the Laboratory quality management systems of the molecular testing laboratories in order to minimize such discrepancies. |
| first_indexed | 2024-04-24T20:26:39Z |
| format | Article |
| id | doaj.art-319b36cc4c184b74b7dddd304a795745 |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-04-24T20:26:39Z |
| publishDate | 2024-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-319b36cc4c184b74b7dddd304a7957452024-03-22T05:35:11ZengPublic Library of Science (PLoS)PLoS ONE1932-62032024-01-01191e028727210.1371/journal.pone.0287272Re-testing as a method of implementing external quality assessment program for COVID-19 real time PCR testing in Uganda.Erick Jacob OkekFredrick Joshua MasembeJocelyn KiconcoJohn KayiwaEsther AmwineDaniel OboteStephen AleleCharles NahabweJackson WereBernard BagayaStephen BalinandiJulius LutwamaPontiano Kaleebu<h4>Background</h4>Significant milestones have been made in the development of COVID19 diagnostics Technologies. Government of the republic of Uganda and the line Ministry of Health mandated Uganda Virus Research Institute to ensure quality of COVID19 diagnostics. Re-testing was one of the methods initiated by the UVRI to implement External Quality assessment of COVID19 molecular diagnostics.<h4>Method</h4>participating laboratories were required by UVRI to submit their already tested and archived nasopharyngeal samples and corresponding meta data. These were then re-tested at UVRI using the WHO Berlin protocol, the UVRI results were compared to those of the primary testing laboratories in order to ascertain performance agreement for the qualitative & quantitative results obtained. Ms Excel window 12 and GraphPad prism ver 15 was used in the analysis. Bar graphs, pie charts and line graphs were used to compare performance agreement between the reference Laboratory and primary testing Laboratories.<h4>Results</h4>Eleven (11) Ministry of Health/Uganda Virus Research Institute COVID19 accredited laboratories participated in the re-testing of quality control samples. 5/11 (45%) of the primary testing laboratories had 100% performance agreement with that of the National Reference Laboratory for the final test result. Even where there was concordance in the final test outcome (negative or positive) between UVRI and primary testing laboratories, there were still differences in CT values. The differences in the Cycle Threshold (CT) values were insignificant except for Tenna & Pharma Laboratory and the UVRI(p = 0.0296). The difference in the CT values were not skewed to either the National reference Laboratory(UVRI) or the primary testing laboratory but varied from one laboratory to another. In the remaining 6/11 (55%) laboratories where there were discrepancies in the aggregate test results, only samples initially tested and reported as positive by the primary laboratories were tested and found to be false positives by the UVRI COVID19 National Reference Laboratory.<h4>Conclusion</h4>False positives were detected from public, private not for profit and private testing laboratories in almost equal proportion. There is need for standardization of molecular testing platforms in Uganda. There is also urgent need to improve on the Laboratory quality management systems of the molecular testing laboratories in order to minimize such discrepancies.https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0287272&type=printable |
| spellingShingle | Erick Jacob Okek Fredrick Joshua Masembe Jocelyn Kiconco John Kayiwa Esther Amwine Daniel Obote Stephen Alele Charles Nahabwe Jackson Were Bernard Bagaya Stephen Balinandi Julius Lutwama Pontiano Kaleebu Re-testing as a method of implementing external quality assessment program for COVID-19 real time PCR testing in Uganda. PLoS ONE |
| title | Re-testing as a method of implementing external quality assessment program for COVID-19 real time PCR testing in Uganda. |
| title_full | Re-testing as a method of implementing external quality assessment program for COVID-19 real time PCR testing in Uganda. |
| title_fullStr | Re-testing as a method of implementing external quality assessment program for COVID-19 real time PCR testing in Uganda. |
| title_full_unstemmed | Re-testing as a method of implementing external quality assessment program for COVID-19 real time PCR testing in Uganda. |
| title_short | Re-testing as a method of implementing external quality assessment program for COVID-19 real time PCR testing in Uganda. |
| title_sort | re testing as a method of implementing external quality assessment program for covid 19 real time pcr testing in uganda |
| url | https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0287272&type=printable |
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